Connecting a Megadrive to a Commodore 1084s monitor

[speedlolita]

60hz Neo Geo composite displays fine on my LCD telly, though?

Yeah, I'll put that down to the screen being old then rather than what I was talking about before. Anyway, here's a SNES on a similar monitor (the Philips I want!)

[speedlolita]

Oh wait, that's the Commodore monitor, lol.

[Duddyroar]

Lovely stuff. The first time I saw a Super Famicom running way back at the dawn of the '90s, it was running F-Zero via an RGB connection on a monitor like that. The same indie store had a Mega Drive running on a similar monitor, and the difference between what I was used to (RF at the time) was like night and day.

How much do those Phillips screens go for these days?

[Duddyroar]

Oh wait, that's the Commodore monitor, lol.

****, yeah. It's a 1084, might be the D? The one I have is an 1084S.

[Duddyroar]

OK, done some more digging, found an Amiga expert who says the monitor will work fine with all my 60Hz gear. Also ordered one of those 9 pin to SCART adapters as well. Fingers crossed. Will post images and possibly video of the thing in action if I can!

[speedlolita]

I'll be interested to see how Neo Geo looks.

Could get one to run alongside an LCD. Can get 480p from the Cube and PS2 so they won't look too awful.

[Duddyroar]

Well like you said before, I'll be able to run all SCART consoles on this bad boy (hopefully). Would be nice to revisit some Saturn classics on a proper CRT.

Let's hope the monitor doesn't die on me when I get all of this sorted - it is over 20 years old now, after all...and has spent 15 of those years in my parent's cold garage...

[speedlolita]

I'm sure it'll be fixed easily if it did break..

Gotta be a ton of Amiga fans that fix em.

[dvdx2]

OK, done some more digging, found an Amiga expert who says the monitor will work fine with all my 60Hz gear. Also ordered one of those 9 pin to SCART adapters as well. Fingers crossed. Will post images and possibly video of the thing in action if I can!

exciting stuff- keep us posted!

[Duddyroar]

No dice, guys.

[bwi]

Not much help but i used to to run my Neo on a phiilips version via scart so i assume by that it can handle the 60hz no problem.

Tbh it used to run everything i used to throw at it. Pity both literally went bang within 6 months of each other,after owning one of them for nearly 17 years.

It was a superb monitor and had all the screen adjusts on the back so i could make everything full screen however crappy some of the old pal ports were lol
bri

[Duddyroar]

I've been tinkering around a bit more:



That video shows me attempting to play a Mega Drive game. The signal is 50hz and as you can see when I fiddle with the V-HOLD dial I can get the picture to stabilise a little, but still not enough to be playable.

[dosucol]

You've the same problem i had when i bought one .Not all 1084sd-1 monitors handle the sync signal ok.Some are fine with just connecting your lead up from the mega drive to the monitor's 9 pin dsub,all you needed was the rgb lines ,cvid and your ground wires. But with my monitor and yours ,it needs modding inside,on the monitors pcb .One spot on an IC chip and the other is just soldering a wire on the back of the monitors 9 pin dsub,where it's soldered to the pcb .

Once that's done ,it's perfect for every console going ,whether retro or rgb scart ps3/360's .

I've been trying to get a 1084DS to work with composite sync going in on pin 7 and had no luck. I googled around and found this thread talking about how some 1084's just don't take composite sync. I tried feeding it to pin 9, both pin 7 and 9, but nothing worked.

So I took a look at the schematics and did some experimenting. I finally got it to work by doing a slight mod to my monitor.

I put a jumper across pins 6 and 10 on the chip labeled I202 (a 74L506). After that, I put composite sync to both pins 7 and 9 on the 9 pin connector. That worked very well. Here's a picture of the jumper I made.

http://www.sega-16.com/forum/showpos...5&postcount=15

The mod is very easy to do .Oops ,just read from the first post,yours is just the s-d model .

http://nfggames.com/forum2/index.php?action=printpage;topic=1953.0

You will probably need to use a LM1881 sync stripper,as you'll be using cvideo ,when it needs csync to sync your picture with the rgb signals .


or follow this guide and you should be good to go !(ignore that he's using an LCD tv ,as the point is the same with both screens,you and he need the csync ,not cvideo .

http://nfggames.com/forum2/index.php?topic=3387.0

http://mmmonkey.co.uk/console/sega/md-sync.htm

You're still using a jap md aye? Well , i'll double check my jap md's din connection just to be 110% correct that csync isn't wired up to the md's 8 pin din socket,only composite video .

[dosucol]

60hz Neo Geo composite displays fine on my LCD telly, though?

It can't display jap/US/ntsc-j/ntsc-u colour frequencies /machines in colour through composite,just through rgb! PAL machines are fine through composite.Just not foreign systems.

[Duddyroar]

Thanks for the info! I have zero soldering skills though. I'd be scared to open up the monitor, to be honest.

I keep hearing people talking about this LM1881 - what is it? An adapter? A cable?